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 * ***** END LICENSE BLOCK ***** */

/**************************************************************************************
 * Fixed-point MP3 decoder
 * Jon Recker (jrecker@real.com), Ken Cooke (kenc@real.com)
 * June 2003
 *
 * mp3tabs.c - platform-independent tables for MP3 decoder (global, read-only)
 **************************************************************************************/

#include "mp3common.h"
#if (CONFIG_APP_MP3PLAYER == 1)
/* indexing = [version][samplerate index]
 * sample rate of frame (Hz)
 */
CONST int samplerateTab[3][3] = {
	{44100, 48000, 32000}, /* MPEG-1 */
	{22050, 24000, 16000}, /* MPEG-2 */
	{11025, 12000, 8000},  /* MPEG-2.5 */
};

/* indexing = [version][layer][bitrate index]
 * bitrate (kbps) of frame
 *   - bitrate index == 0 is "free" mode (bitrate determined on the fly by
 *       counting bits between successive sync words)
 */
CONST short bitrateTab[3][3][15] = {
	{
		/* MPEG-1 */
		{0, 32, 64, 96, 128, 160, 192, 224, 256, 288, 320, 352, 384, 416, 448}, /* Layer 1 */
		{0, 32, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320, 384},	/* Layer 2 */
		{0, 32, 40, 48, 56, 64, 80, 96, 112, 128, 160, 192, 224, 256, 320},		/* Layer 3 */
	},
	{
		/* MPEG-2 */
		{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, /* Layer 1 */
		{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160},		 /* Layer 2 */
		{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160},		 /* Layer 3 */
	},
	{
		/* MPEG-2.5 */
		{0, 32, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, 256}, /* Layer 1 */
		{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160},		 /* Layer 2 */
		{0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160},		 /* Layer 3 */
	},
};

/* indexing = [version][layer]
 * number of samples in one frame (per channel)
 */
CONST short samplesPerFrameTab[3][3] = {
	{384, 1152, 1152}, /* MPEG1 */
	{384, 1152, 576},  /* MPEG2 */
	{384, 1152, 576},  /* MPEG2.5 */
};

/* layers 1, 2, 3 */
CONST short bitsPerSlotTab[3] = {32, 8, 8};

/* indexing = [version][mono/stereo]
 * number of bytes in side info section of bitstream 
 */
CONST short sideBytesTab[3][2] = {
	{17, 32}, /* MPEG-1:   mono, stereo */
	{9, 17},  /* MPEG-2:   mono, stereo */
	{9, 17},  /* MPEG-2.5: mono, stereo */
};

/* indexing = [version][sampleRate][bitRate] 
 * for layer3, nSlots = floor(samps/frame * bitRate / sampleRate / 8)
 *   - add one pad slot if necessary
 */
CONST short slotTab[3][3][15] = {
	{
		/* MPEG-1 */
		{0, 104, 130, 156, 182, 208, 261, 313, 365, 417, 522, 626, 731, 835, 1044},	  /* 44 kHz */
		{0, 96, 120, 144, 168, 192, 240, 288, 336, 384, 480, 576, 672, 768, 960},	  /* 48 kHz */
		{0, 144, 180, 216, 252, 288, 360, 432, 504, 576, 720, 864, 1008, 1152, 1440}, /* 32 kHz */
	},
	{
		/* MPEG-2 */
		{0, 26, 52, 78, 104, 130, 156, 182, 208, 261, 313, 365, 417, 470, 522},	 /* 22 kHz */
		{0, 24, 48, 72, 96, 120, 144, 168, 192, 240, 288, 336, 384, 432, 480},	 /* 24 kHz */
		{0, 36, 72, 108, 144, 180, 216, 252, 288, 360, 432, 504, 576, 648, 720}, /* 16 kHz */
	},
	{
		/* MPEG-2.5 */
		{0, 52, 104, 156, 208, 261, 313, 365, 417, 522, 626, 731, 835, 940, 1044},	  /* 11 kHz */
		{0, 48, 96, 144, 192, 240, 288, 336, 384, 480, 576, 672, 768, 864, 960},	  /* 12 kHz */
		{0, 72, 144, 216, 288, 360, 432, 504, 576, 720, 864, 1008, 1152, 1296, 1440}, /*  8 kHz */
	},
};

/* indexing = [version][sampleRate][long (.l) or short (.s) block] 
 *   sfBandTable[v][s].l[cb] = index of first bin in critical band cb (long blocks)
 *   sfBandTable[v][s].s[cb] = index of first bin in critical band cb (short blocks)
 */
CONST SFBandTable sfBandTable[3][3] = {
	//modify by zjw for more memory
	{
		/* MPEG-1 (44, 48, 32 kHz) */
		{
			{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 52, 62, 74, 90, 110, 134, 162, 196, 238, 288, 342, 418, 576},
			{0, 4, 8, 12, 16, 22, 30, 40, 52, 66, 84, 106, 136, 192}},
		{{0, 4, 8, 12, 16, 20, 24, 30, 36, 42, 50, 60, 72, 88, 106, 128, 156, 190, 230, 276, 330, 384, 576},
		 {0, 4, 8, 12, 16, 22, 28, 38, 50, 64, 80, 100, 126, 192}},
		{{0, 4, 8, 12, 16, 20, 24, 30, 36, 44, 54, 66, 82, 102, 126, 156, 194, 240, 296, 364, 448, 550, 576},
		 {0, 4, 8, 12, 16, 22, 30, 42, 58, 78, 104, 138, 180, 192}}},

	{
		/* MPEG-2 (22, 24, 16 kHz) */
		{
			{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
			{0, 4, 8, 12, 18, 24, 32, 42, 56, 74, 100, 132, 174, 192}},
		{{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 114, 136, 162, 194, 232, 278, 332, 394, 464, 540, 576},
		 {0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 136, 180, 192}},
		{{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
		 {0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192}},
	},

	{
		/* MPEG-2.5 (11, 12, 8 kHz) */
		{
			{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
			{0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192}},
		{{0, 6, 12, 18, 24, 30, 36, 44, 54, 66, 80, 96, 116, 140, 168, 200, 238, 284, 336, 396, 464, 522, 576},
		 {0, 4, 8, 12, 18, 26, 36, 48, 62, 80, 104, 134, 174, 192}},
		{{0, 12, 24, 36, 48, 60, 72, 88, 108, 132, 160, 192, 232, 280, 336, 400, 476, 566, 568, 570, 572, 574, 576},
		 {0, 8, 16, 24, 36, 52, 72, 96, 124, 160, 162, 164, 166, 192}},
	},
};
#endif /* CONFIG_APP_MP3PLAYER */
